M9208-xxx-x Series Electric Spring Return Actuators Product Bulletin1 Refer to the QuickLIT Web site for the most up-to-date version of this document.The M9208-xxx-x Series Electric Spring Return Actuators provide control of dampers in Heating, Ventilating, and Air Conditioning (HVAC) systems. All actuators in this series provide 70 lb·in (8N·m) rated torque. A mechanical spring return system provides rated torque with and without power applied to the actuator. The series includes the following control options:•On/Off, 24 V, 120 VAC, 230 VAC power•On/Off and Floating Point, 24 V power•Proportional, 24 V power, for 0(2) to 10 VDC or0(4) to 20 mA Control SignalThese actuators are configured for direct mounting and do not require a damper linkage. Actuators can be mounted directly to a damper shaft from 5/16 to 5/8 in. (8 to 16 mm) diameter with a universal clamp. For shafts up to 3/4 in. (19 mm) diameter use the accessory Large Shaft Coupler Kit M9208-600. An accessory crankarm and remote mounting kit are available for applications where the actuator cannot be direct-coupled to the damper shaft. Optional line voltage auxiliary switches indicate an end-stop position or perform switching functions within the selected rotation range.Figure 1: M9208-xxx-x Series Electric Spring Return ActuatorTable 1: Features and Benefits (Part 1 of 2)FeaturesBenefits70 lb·in (8 N·m) Rated TorqueProvides high torque in a compact package size to expand the range of damper applications in HVAC systems.Direct-Coupled DesignRequires no crankarm or linkage and is capable of direct mounting to a shaft up to3/4 in. (19 mm) diameter and centered on a 1/2 in. (13 mm) shaft.Reversible MountingProvides either clockwise or counterclockwise operation.Electronic Stall DetectionProtects from overload at all angles of rotation. Power consumption is reduced in holding mode. The actuator may be stalled anywhere in its rotation range without the need for mechanical end switches.Double-Insulated ConstructionAllows that electrical ground connection is not necessary for regulatory agency compliance.Microprocessor-controlledBrushless DC Motor(-AGx and -GGx types)Provides constant runtime independent of torque.External Mode Selection Switch(-AGx and -GGx types)Permits control logic reversal for Floating Control (-AGx types).Permits calibration, input signal range selection, and control logic reversal for Proportional Control (-GGx types).M9208-xxx-x Series Electric Spring Return ActuatorsProduct BulletinM9208-GGx-x, M9208-AGx-x, M9208-Bxx-3Code No. LIT-12011480 Issued December 2017M9208-xxx-x Series Electric Spring Return Actuators Product Bulletin2ApplicationM9208-GGx-x Series Proportional ActuatorsFor proportional modulation of dampers requiring up to 70 lb·in. (8N·m) in HVAC systems that are controlled by an electronic controller or positioner. The actuator responds to 0 to 10 VDC, or 2 to 10 VDC control signals. With the addition of a 500 ohm resistor, the actuator responds to a 0 to 20 mA, or 4 to 20 mA signal. A 0 to 10 VDC, or 2 to 10 VDC feedback signal indicates position and provides support for master-slave applications.The M9208-GGA-2 actuators include plenum-rated cables and are specially configured for installation in spaces used for environmental air-handling purposes, other than ducts and plenums, as specified in National Fire Protection Association (NFPA) 70: National Electrical Code section 300.22(C), Other Space Used for Environmental Air. The space over a hung ceiling, when used for environmental air handling purposes, is an example of the type of space for which these actuators are configured.M9208-AGx-x Series On/Off and Floating Point ActuatorsFor on/off control or modulation of dampers requiring up to 70 lb·in. (8N·m) in HVAC systems. Floating point control can be provided from a triac or relay. On/off control can be provided from a manual switch, controller, auxiliary switch from a fan motor contactor, or similar device.The M9208-AGA-2 actuators include plenum-rated cables and are specially configured for installation in spaces used for environmental air-handling purposes other than ducts and plenums as specified in National Fire Protection Association (NFPA) 70: National Electrical Code section 300.22(C), Other Space Used for Environmental Air. The space over a hung ceiling, when used for environmental air handling purposes, is an example of the type of space for which these actuators are configured.Locking Manual Override with Auto Release and Crank StorageAllows manual positioning of the actuator hub with automatic return to normal operation when power and control signal are restored.Override Control (Proportional Model Only)Supports control system override applications through field wiring.Integral Cables with Colored and Numbered ConductorsSimplify installation and field wiring.Integral Connectors for 3/8 in. (10mm) Flexible Metal Conduit (FMC)Simplify installation and field wiring.Optional Integrated Auxiliary SwitchesProvide two integrated, line-voltage-capable Single-Pole, Double-Throw (SPDT) switches with one fixed and one adjustable switch point. Facilitates safety interfacing or signaling.UL, CE, and C-Tick ComplianceProvides internationally recognized regulatory agency approvals.Manufactured under International Standards Organization (ISO) 9001 Quality Control StandardsEnsures quality.5-Year WarrantyProtects consumer investment.Table 1: Features and Benefits (Part 2 of 2)FeaturesBenefitsIMPORTANT:Use these M9208-xxx-x Series Electric Spring Return Actuators only to control equipment under normal operating conditions. Where failure or malfunction of the electric actuator could lead to personal injury or property damage to the controlled equipment or other property, additional precautions must be designed into the control system. Incorporate and maintain other devices, such as supervisory or alarm systems or safety or limit controls, intended to warn of or protect against failure or malfunction of the electric actuator.IMPORTANT:Before specifying M9208-xxx-x Series Electric Spring Return Actuators for plenum applications, verify acceptance of exposed plastic materials in plenum areas with the local building authority. Building codes for plenum requirements vary by location. Some local building authorities accept compliance to UL 1995, Heating and Cooling Equipment, while others use different acceptance criteria.M9208-xxx-x Series Electric Spring Return Actuators Product Bulletin3M9208-Bxx-3 Series On/Off ActuatorsFor on/off control of dampers requiring up to 70 lb·in. (8N·m) in HVAC systems. On/off control can be provided from a manual switch, controller, auxiliary switch from a fan motor contactor, or similar device.OperationM9208-xxx-x Series actuators provide 95º of rotation. A graduated scale from -5º to 90º and a position indicator provide visual indication of stroke. A manual override allows manual positioning and temporary locking of the actuator output hub. Restoring power and control signal to the actuator automatically releases the manual override the first time the actuator is commanded to advance past the locked position. During installation, the installer can advance the spring and mount the actuator to provide positive close-off on air-tight damper applications. When power fails during service, the mechanical spring return system provides rated torque to the connected equipment, returning it to the home position.M9208-GGx-x Series Proportional ActuatorsThe M9208-GGx-x Series uses a brushless DC motor controlled by a microprocessor. The microprocessor drives the motor at constant speed, independent of torque. The microprocessor also monitors the brushless DC motor’s rotation to prevent damage to the actuator in a stall condition. The actuator can be stalled anywhere within its rotation range without the need for mechanical end switches. Power consumption is reduced in the holding mode.The M9208-GGC-3 version is provided with two integrated, line-voltage-capable auxiliary SPDT switches. The Switch S1 switch point is fixed at 11º closing, while the Switch S2 switch point is independently and continuously adjustable from 25º to 90º. Auxiliary switches are double-insulated so an electrical ground is not required.M9208-AGx-x Series On/Off and Floating Point ActuatorsThe M9208-AGx-x Series uses a brushless DC motor controlled by a microprocessor. The microprocessor drives the motor at constant speed, independent of torque. The microprocessor also monitors the brushless DC motor's rotation to prevent damage to the actuator in a stall condition. The actuator can be stalled anywhere within its rotation range without the need for mechanical end switches. Power consumption is reduced in the holding mode.The M9208-AGC-3 version is provided with two integrated, line-voltage-capable auxiliary SPDT switches. The Switch S1 switch point is fixed at 11º closing, while the Switch S2 switch point is independently and continuously adjustable from 25º to 90º. Auxiliary switches are double-insulated so an electrical ground is not required.M9208-Bxx-3 Series On/Off ActuatorsThe M9208-Bxx-3 Series uses a DC brush motor controlled by analog electronics. The actuator can be stalled anywhere within its rotation range without the need for mechanical end switches. Power consumption is reduced in the holding mode. Three different voltage ratings are available for On/Off Actuators.•M9208-BGx-3: AC 24 V 50/60 Hz orDC 24 V power•M9208-BAx-3: AC 120 V 50/60 Hz power•M9208-BDx-3: AC 230 V 50/60 Hz powerThe M9208-BAx-3 and M9208-BDx-3 actuators are double-insulated so an electrical ground is not required.The M9208-BxC-3 versions are provided with two integrated, line-voltage-capable auxiliary SPDT switches. The Switch S1 switch point is fixed at 11º closing, while the Switch S2 switch point is independently and continuously adjustable from 25º to 90º. Auxiliary switches are double-insulated so an electrical ground is not required.M9208-xxx-x Series Electric Spring Return Actuators Product Bulletin4Wiring DiagramsM9208-GGx-x Series Proportional Actuators M9208-GGx-x Control Wiring DiagramsNote:In master-slave applications, the slave actuator lags the master actuator position by a few seconds. IMPORTANT:Do not install multiple M9208-GGx-x Series Actuators connected to the same mechanical load. Master-slave application of M9208-GGx-x Series Actuators requires that each actuator be connected to independent loads.Figure 2: M9208-GGx-x Control Wiring DiagramsFIG:M9xxx-GGx_cntrlwir_PB1234~(+)YCOMUBLKREDGRYORN0(4)...20 mA++500 / 0.25 W0(4)...20 mA Control withExternal ResistorAC/DC24 VDC 0(2)...10 V1234~(+)YCOMUBLKREDGRYORN++DC 0(2)...10 V ControlAC/DC24 VDC 0(2)...10 VDC 0(2)...10 VMaster-Slave ApplicationYDC 0(2)...10 V+U+1234BLKREDGRYORNAC/DC24 v~(+)DC 0(2)...10 VCOM+1234BLKREDGRYORNFigure 3: M9208-GGx-x Control Wiring Diagram(Overrides)1234~YCOMUBLKREDGRYORN++Override to MIN positionAC24 VDC 0(2)...10 VDC 0(2)...10 VAA Open = MIN PositionA Closed = Normal Operation1234~YCOMUBLKREDGRYORN++Override to MAX positionAC24 VDC 0(2)...10 VDC 0(2)...10 VCB Closed = MAX PositionC Closed = Normal OperationB1234~COMUBLKREDGRYORN++Override toMIN, MID, MAX positions0(4)...20 mA Control withExternal ResistorAC24 VA0(4)...20 mA500 / 0.25 WBC1234~COMUBLKREDGRYORN++Override toMIN, MID, MAX positions0(2)...10 V ControlAC24 VABCDC 0(2)...10 VYFUNCTIONABC0% ( MIN )50% ( MID )100% ( MAX )NORMALFUNCTIONABC0% ( MIN )50% ( MID )100% ( MAX )NORMALYΩFIG:M9203GGx2(Z)_wirM9208-xxx-x Series Electric Spring Return Actuators Product Bulletin5M9208-Bxx-3 Series On/Off ActuatorsM9208-AGx-x Series On/Off and Floating Point ActuatorsM9208-xxx-x Auxiliary SwitchesRepair InformationA number of replacement parts are available; see Table3 for more details. If an M9208-xxx-x Series Electric Spring Return Actuator fails to operate within its specifications, replace the unit. For a replacement electric actuator, contact the nearest JohnsonControls® representative.Figure 4: M9208-Bxx-3 Control Wiring DiagramsAC 120 V 60 HzL1NWHTBLK21AC 230 V 50/60 HzL1NBLUBRN21AC 24 V 50/60DC 24 VREDBLK21+-~FIG:M92xx-Bxx-2S_wiringFigure 5: M9208-AGx-x Control Wiring Diagrams~+-24 VAC24 VDCRARADADA4BLKREDGRYORN123Floating Control, Four Wire~+-24 VAC24 VDCRARADADA4BLKREDGRYORN123On/Off Control, Two Wire~+-24 VAC24 VDCRARADADA4BLKREDGRYORN123Open/Close, Single Wire ControlFIG:M92xx-AGx_cntrlwir_PB24 VAC24 VDC~+-RARADADA4BLKREDGRYORN123RARADADA4BLKREDGRYORN123Floating Control, Multiple Actuators with One TransformerFigure 6: M9208-xxx-x Auxiliary SwitchWiring DiagramCOMNCNO21212322212223BLK/REDBLK/BLUBLK/GRYCOMNCNO242526WHT/REDWHT/BLUWHT/GRY25242426S2S1FIG:xxC_Switch_WiringM9208-xxx-x Series Electric Spring Return Actuators Product Bulletin6Ordering InformationTable 2: M9208-xxx-x Series Electric Spring Return Actuator ModelsCode NumberRotation TimeFor 90°Power RequirementsPower ConsumptionInput SignalPosition FeedbackAuxiliary SwitchesElectrical ConnectionPower On (Running)Power Off (Spring Return)24 VAC +/- 25%, VDC +20%/-10%24 VAC +/- 20%, VDC +20%/-10%120 VAC +/- 10%230 VAC +/- 10%VA Rating, Transformer SizingVA: Running (Holding)Amperage: Running (Holding)On/OffFloating Point0(2) to 10 VDC0(4) to 20 mA (with 500 ohm Resistor)0(2) to 10 VDC2 SPDT, 5.0 A (2.9 A Inductive) at 240 V48 in. (1.2 m) 18 AWG Appliance Cable120 in. (3.05 m) 19 AWG Plenum CableIntegral 3/8 in. (10 mm) FMC ConnectorsM9208-AGA-215017 to 251x87.9 (5.5)-xxxxM9208-AGA-315017 to 251x87.9 (5.5)-xxxxM9208-AGC-315017 to 251x87.9 (5.5)-xxxxxM9208-BGA-355 to 7113 to 262x76.1 (1.2)-xxxM9208-BGC-355 to 7113 to 262x76.1 (1.2)-xxxxM9208-BAA-355 to 7113 to 262x--.05 (.03)xxxM9208-BAC-355 to 7113 to 262x--.05 (.03)xxxxM9208-BDA-355 to 7113 to 262x--.04 (.03)xxxM9208-BDC-355 to 7113 to 262x--.04 (.03)xxxxM9208-GGA-215017 to 251x87.9 (5.5)-xxxxM9208-GGA-315017 to 251x87.9 (5.5)-xxxxM9208-GGC-315017 to 251x87.9 (5.5)-xxxxx1.22 seconds nominal at room temperature and rated load, 94 seconds maximum at rated load and -40ºF (-40ºC)2.21 seconds nominal at room temperature and rated load, 39 seconds maximum at rated load and -4ºF (-20ºC), 108 seconds maximum at 53 lb·in. (6 N·m) and -40ºF (-40ºC)M9208-xxx-x Series Electric Spring Return Actuators Product Bulletin7 Table 3: Accessories and Replacement Parts (Order Separately)Code NumberDescriptionDMPR-KC00317in. (178mm) Blade Pin Extension (without bracket) for JohnsonControls Direct-Mount Damper Applications (quantity 1)M9000-322Weathershield Kit for Damper Application of M9104, M9203, M9208,and M9308/9310 Series Electric Actuators (quantity 1)M9000-400Jackshaft Linkage Kit. Open-ended design enables clamping onto a jackshaft without requiring access to the ends of the jackshaft (quantity 1)M9000-560Ball Valve Linkage Kit for applying M9203 and M9208 Series Electric Spring Return Actuators to VG1000 Series Valves (quantity 1)M9000-604Replacement Anti-Rotation Bracket Kit for M9208, M9220, M9308, M9310, M9320, and M9335 Series Electric Actuators (quantity 1)M9000-606Position Indicator for Damper Applications of M9203 and M9208 Series Actuators (quantity 5)M9200-100Threaded Conduit Adapter, 1/2 NPSM, for M9210(20) and M(VA)9208 Series Actuators (quantity 5)M9208-100Remote Mounting Kit, including MountingBracket, M9208-150 Crankarm, Ball Joint, and mounting fasteners (quantity 1)M9208-150Crankarm Adapter Kit (quantity 1)M9208-600Large Shaft Coupler Kit (with Locking Clip) for Mounting M9208 Series Electric SpringReturn Actuators on dampers with round shafts from 1/2to3/4 in.(12to19 mm) or square shafts from 3/8to9/16in.(10to14mm) (quantity 1)M9208-601Replacement Standard Coupler Kit (with Locking Clip) for mounting M9208 Series Electric SpringReturn Actuators on dampers with round shafts from 5/16to5/8in.(8to16mm) or square shafts from 1/4to 1/2in.(6to12mm) (quantity 1)M9208-602Replacement Locking Clips for M9208 Series Electric Spring Return Actuators (quantity 5)M9208-603Adjustable Stop Kit for M9208 Series Electric Spring Return Actuators (quantity 1)M9220-604Replacement Manual Override Cranks for M9208 Series Electric Spring Return Actuatorswith long crank radius: 2.83in.(72mm) (quantity 5)M9208-605Replacement Manual Override Cranks for M9208 Series Electric Spring Return Actuatorswith short crank radius: 1.83in.(46.5mm) (quantity 5)M9000-700Universal Ball Valve Linkage Kit (quantity 1)1.Furnished with the damper and may be ordered separately.M9208-xxx-x Series Electric Spring Return Actuators Product Bulletin8DimensionsTechnical Specifications Figure 7: M9208-xxx-x Series Electric Spring Return Actuator Dimensions, in. (mm)FIG:M9208-Dims1-3/8(34.5)1-19/32(40.7)21/32(16.7)3/4 (19)1/4 (6.4)2-1/4 (57.5)3-29/32(99)2-9/16(64.5)1/8(3.2)4-3/4(120.7)1-1/8(28.5)4-29/32(124.8)6-5/16(160.7)1/4 (6.5) Slot Width4 Mounting Holes4-7/32 (5.45)DiameterM9208-GGx-x Series Proportional Electric Spring Return Actuator (Part 1 of 3)PowerRequirements-GGx ModelsAC 24 V (AC 19.2 V to 28.8 V) at 50/60 Hz: Class 2 (North America) or Safety Extra-Low Voltage (SELV) (Europe), 7.9 VA Running, 5.5 VA Holding PositionDC 24 V (DC 21.6 V to 28.8 V): Class 2 (North America) or SELV (Europe),3.5 W Running, 1.9 W Holding PositionMinimum Transformer Size: 8 VA per ActuatorInput Signal / Adjustments-GGx ModelsFactory Set at DC 0 to 10 V, CW Rotation with Signal Increase;Selectable DC 0 (2) to 10 V or 0 (4) to 20 mA with Field-Furnished 500 ohm 0.25 W Minimum Resistor;Switch Selectable Direct or Reverse Action with Signal IncreaseControl Input Impedance-GGx ModelsVoltage Input: 100,000 ohmCurrent Input: 500 ohm with Field Furnished 500 ohm ResistorFeedback Signal-GGx ModelsDC 0 (2) to 10 V for Desired Rotation Range up to 95°Corresponds to Rotation Limits, 0.5 mA at 10 V MaximumAuxiliary SwitchRating-xxC ModelsTwo Single-Pole, Double-Throw (SPDT), Double-Insulated Switches with Gold over Silver Contacts:AC 24 V, 50 VA Pilot DutyAC 120 V, 5.8 A Resistive, 1/4 hp, 275 VA Pilot DutyAC 240 V, 5.0 A Resistive, 1/4 hp, 275 VA Pilot DutySpring ReturnDirection Is Selectable with Mounting Position of Actuator:Actuator Face Labeled A Is Away from Damper or Valve: CCW Spring ReturnActuator Face Labeled B Is Away from Damper or Valve: CW Spring ReturnM9208-xxx-x Series Electric Spring Return Actuators Product Bulletin9Rated TorquePower On(Running)70 lb·in. (8 N·m) All Operating TemperaturesPower Off(Spring Returning)70 lb·in. (8 N·m) All Operating TemperaturesRotation RangeMaximum Full Stroke: 95°Adjustable Stop: 35° to 95° Maximum PositionRotation Timefor 90 Degrees ofTravelPower On(Running)150 Seconds Constant for 0 to 70 lb·in (8 N·m) Load,at all Operating Conditions90 Seconds for 0 to 70 lb·in (8 N·m) Load in Calibration Mode or Override ModePower Off(Spring Returning)17 to 25 Seconds for 0 to 70 lb·in. (8 N·m) Load, at Room Temperature22 Seconds Nominal at Full Rated Load94 Seconds Maximum with 70 lb·in. (8 N·m) Load, at -40°F (-40°C)Life Cycles60,000 Full Stroke Cycles with 70 lb·in. (8 N·m) Load1,500,000 Repositions with 70 lb·in. (8 N·m) LoadAudible Noise RatingPower On(Running)<35 dBA at 70 lb·in. (8 N·m) Load, at a Distance of 39-13/32 in. (1 m)Power On(Holding)<20 dBA at a Distance of 39-13/32 in. (1 m)Power Off(Spring Returning)<52 dBA at 70 lb·in. (8 N·m) Load, at a Distance of 39-13/32 in. (1 m)Electrical ConnectionsModels: GGx-348 in. (1.2 m) UL 758 Type AWM Halogen Free Cable with 18 AWG(0.85 mm²) Conductors and 0.25 in. (6 mm) Ferrule EndsModels: GGA-2120 in. (3.05 m) UL 444 Type CMP Plenum Rated Cable with 19 AWG(0.75 mm²) Conductors and 0.25 in. (6 mm) Ferrule EndsAuxiliary Switches(-xxC Models)48 in. (1.2 m) UL 758 Type AWM Halogen Free Cable with 18 AWG(0.85 mm²) Conductors and 0.25 in. (6 mm) Ferrule EndsConduit ConnectionsIntegral Connectors for 3/8 in. (10 mm) Flexible Metal ConduitMechanicalConnectionsRound ShaftsRange of Sizes: 5/16 to 5/8 in. (8 to 16 mm)Square ShaftsRange of Sizes: 1/4 to 1/2 in. (6 to 12 mm)Enclosure RatingNEMA 2 (IP54) for all Mounting DirectionsAmbientConditionsStandard Operating-40 to 140°F (-40 to 60°C); 90% RH Maximum, NoncondensingStorage-40 to 185ºF (-40 to 85ºC); 95% RH Maximum, NoncondensingDimensions6.33 x 3.90 x 2.26 in. (160.7 x 99 x 57.5 mm)M9208-GGx-x Series Proportional Electric Spring Return Actuator (Part 2 of 3)Next >